Lexing Xie

Publications
Influence

AutoRec: Autoencoders Meet Collaborative Filtering

S. Sedhain, A. Menon, S. Sanner, Lexing Xie
Computer Science
WWW
18 May 2015

This paper proposes AutoRec, a novel autoencoder framework for collaborative filtering (CF). Expand

IBM Research TRECVID-2007 Video Retrieval System

A. Natsev, Joshua R. Smith, +4 authors Michele Merler
Computer Science
TRECVID
2007

In this paper, we describe the IBM Research system for indexing, analysis, and retrieval of video as applied to the TREC-2007 video retrieval benchmark. Expand

Improving LDA topic models for microblogs via tweet pooling and automatic labeling

R. Mehrotra, S. Sanner, Wray L. Buntine, Lexing Xie
Computer Science
SIGIR
28 July 2013

We investigate methods to improve topics learned from Twitter content without modifying the basic machinery of LDA; we achieve this through various pooling schemes that aggregate tweets in a data preprocessing step. Expand

Social media use by government: from the routine to the critical

Andrea L. Kavanaugh, E. Fox, +6 authors Lexing Xie
Business, Computer Science
dg.o '11
12 June 2011

Social media (i.e., Twitter, Facebook, Flickr, YouTube) and other services with user-generated content have made a staggering amount of information (and misinformation) available. Expand

Algorithms and system for segmentation and structure analysis in soccer video

Peng Xu, Lexing Xie, S. Chang, Ajay Divakaran, A. Vetro, H. Sun
Computer Science
IEEE International Conference on Multimedia and…
22 August 2001

We present a novel system and effective algorithms for soccer video segmentation. Expand

Social media use by government: From the routine to the critical

Andrea L. Kavanaugh, E. Fox, +5 authors Lexing Xie
Sociology, Computer Science
Gov. Inf. Q.
1 October 2012

This paper presents findings from a exploratory study we conducted between June and December 2010 with government officials in Arlington, VA (and the greater National Capitol Region around Washington, D.C.), with the broad goal of understanding social media use by government officials as well as community organizations, businesses, and the public at large. Expand

Semantic concept-based query expansion and re-ranking for multimedia retrieval

A. Natsev, A. Haubold, Jelena Tesic, Lexing Xie, Rong Yan
Computer Science
ACM Multimedia
29 September 2007

We study the problem of semantic concept-based query expansion and re-ranking for multimedia retrieval. Expand

Structure analysis of soccer video with domain knowledge and hidden Markov models

Lexing Xie, Peng Xu, S. Chang, Ajay Divakaran, H. Sun
Computer Science
Pattern Recognit. Lett.
1 May 2004

In this paper, we present statistical techniques for parsing the structure of produced soccer programs using domain knowledge and supervised learning of statistical models. Expand

Structure analysis of soccer video with hidden Markov models

Lexing Xie, S. Chang, Ajay Divakaran, H. Sun
Computer Science
IEEE International Conference on Acoustics…
13 May 2002

In this paper, we present algorithms for parsing the structure of produced soccer programs. Expand

How Does the Data Sampling Strategy Impact the Discovery of Information Diffusion in Social Media?

Munmun De Choudhury, Y. Lin, H. Sundaram, K. Candan, Lexing Xie, A. Kelliher
Computer Science
ICWSM
1 December 2010

This paper studies the impact of different attribute and topology based sampling strategies on the discovery of an important social media phenomena–information diffusion. Expand

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